TMR vs Hall Effect: TechRadar says newer magnetic sensor tech wins for gaming peripherals
TMR (Tunnel Magnetoresistance) is superior to Hall Effect for gaming keyboards and controllers, offering lower power draw and higher sensitivity, but it costs more, according to TechRadar.
The Hall Effect, discovered by Edwin Hall in 1879, works by detecting voltage changes across an electrical conductor when a magnetic field is present. In gaming peripherals, this allows for non-contact sensing, eliminating the physical wear of traditional potentiometers that cause joystick drift in controllers and enabling fully adjustable actuation points in keyboards. Hall Effect switches use a magnet in the switch that moves toward the board without metal-to-metal contact, offering a lifespan far longer than mechanical switches.
TMR, discovered by Michel Jullière in 1975, is a quantum mechanical effect that measures resistance changes between two ferromagnetic layers separated by an insulating barrier. This technology responds to the slightest variations in magnetic fields, making it extremely sensitive and precise. For gaming, TMR enables granular signal actuation in keyboards and controllers, and because it measures resistance rather than voltage, it requires less signal amplification and consumes significantly less power.
TechRadar’s direct comparison highlights two key differences. Power consumption for Hall Effect is typically around 1 to 10 milliamps, while TMR operates in the microamp to sub-milliamp range. TMR also offers much higher sensitivity, as it can detect weaker magnetic fields than Hall Effect. Both technologies support polling rates from 1,000Hz to 8,000Hz, and both use non-contact designs that reduce wear and address the stick drift issue.
In terms of manufacturing, Hall Effect is a mature technology with low component costs. TMR is still maturing, with prices beginning to drop but currently higher. TechRadar states that TMR is superior for today’s high-end gaming gear, especially wireless devices where low power draw is crucial. However, the report cautions that the higher cost may make Hall Effect the more practical choice for budget-conscious buyers. The article stops short of declaring a universal winner, noting that both technologies are significant improvements over older mechanical systems.